Improvement in paper-cutting machines



arch.

attained @Settim parte f epm.

ANsoN HARDY., or Bos-Ton,MASSACHUSETTS,

' Lenm'PazmtNo.101,873, (zml April 12,1876.

IMPROVEMENT." IN PAPER-CUTTIN G- MACHINES.

The Schedule referred t in these Lettera Patent and making par't o! the same i I',A.'Ns01v HARDY, of Boston, in the county of Suffolk'v and State of Massachusetts, have invented certain new and useful Improvements in Paper-Guttau g Machines, of which the following is a specitication.

suitable nuts moving' thereon, in combination with a.

pairl of radius arms, Vthe lower ends of which are connected to the knile-bar,a11d the upper ends to the nuts operated by the screw-shaft, in such-a manner that, by the revolution in one direction of tl1e screwshaft, the knife will be forced down through the `paper in a vertical direction, the knife being guided in grooves formed for the purpose in the uprightport-ions of the It also consists in fitting the nuts operated bysaid 4screwfshaft to guide-bearings, onithe underside of the. cross-beam of the arch, in such a manner that the whole strain of the resistance to the movement of the -knife may be transmitted to said' cross-beam without springing the screw-shaft.

' When the knife has completed its put, itis raised again to the starting point, by reversing the motion of the screw-shaft, the machine being arranged to be op erated by hand only; but the same mechanism may be used to operate'the knife in a power cutter by the addition' of a lreversing-gear, therefore I do not wish to confine myself to the use of this device-in a hand machine alone.

This device is also capable of various modifications;

as, for instance, the radius arms may be crossed, as

shown in iig. 1 of the drawings, or they may be arranged as shown in tig. 4, and he operated'by arightand-left-thread on the screw-shaft, so tbat'the tops of said radins arms will gradually approach nearer to leach otheras the screw is revolved; or, only one thread may he used on the screw-shaft, and the radins arms be arranged parallel to eachother, as shown in iig. A5; thereforel do not wish to conine myself to the particular arrangement of,ibe radius arms which I have selected toillustrate the principle of my invention.'

My invention relates, in the second place, to the construction of the upper portion ofthe frame, and

`It consists invcasting the whole arch, consisting of the two nprights and the upper cross-beam, in one piece, and securing the whole to the table and iever portion of the frame by suitable bolts, soas to make the strongest possibleiarch, to receive the strain occa Description of g the Acconqmayi-ng Drawings.

Figure 1 is a front elevation oia. machine er'nhodying my invention, and representing one of the modes of applying the radius arms t0 movethe knife.

Figure 2 is a sectional plan of the same, the sect-ion heilig taken on line x x, on g. 1.

Figure 3 is a vertical section on line t' ou tig. 1. Figures 4 and 5 show othermodilications of the application of the radius arms to the knife and .screwshaft.

I Gcneral Description.

A is thc lower frame of the machine, and

B is the table, on which the `paperl is to be placed to he cut, and is bolted firmly to the trames A.v

The flames A are secured together at the bottom by the girts C.

D is the arch, or upper portion of the frame, cast in one piece, and holtedirmly to the table B.

E is the knife, secured hy bolts to t-he knife-bar F, which is fitted to slide up and down in grooves a, formed for the purpose in the upright portions 1) of the arch D.

Gis a shaft, having hearings at either end in the upright portionsof the `arch D, and having the spur gear\ Vheel H mounted thereon, which meshes into the pinion I on the short shaft J, on the outer end of which is mounted the hand or iiy-wheel K.

lhe shaft G is made in two pieces, andl connected together by the lcoupling b, so as to form one shaft.

The shaft G has screw-threads formed upon it, that portion on one side of the coupling b being a righthand thread, andthat portion on the other side of the coupling b being a left-hand thread; and cach portion of said shaft has mounted upon it a nut, L, fittedv to the right-hand thread, and the other on the left-hand thread, so that, when the screw-shaft is revolved in one direction, they shall gradually approach each other until they both come in contact with the ends of the coupling b, when the motion in that direction ceases.

M and N are two radius arms or links, the lower ends of which are secured, by the pins c c, to the knife-bar F, and the upper ends are secured to the nuts L by the pins d d, said radius arms or links crossing each other, as shown iu tig. l, orrarranged as 'shown in iig. 4, without crossing each other; or, they may be arranged, as shown in iig. 5, parallel to each other, and the nuts attached to their upper ends lo@y both moved in the'same direction byaright-hand thread upon the screw-shaft, and, by the vibration of tbe upper ends of' said arms or links, force the knife down through the paper in a perfectly obvious mauncr.

O is a clamp-bar, to hold the paper while it is being eut, :md is operated bythe action ofthe piuions I l?, on the shaft Q, upon the vertical racks It It, and is held in position by the double pawl c, acting upon the ratchet-teeth cut in the rim of the hand-wheel S.

The coupling 11, on the shaft G, serves the purpose of a stop, to limit the extent of the downward movement of the knife, and thereby prevent injury to the knife or table.

The operation-of my machine is so fully explained that l think' it needs no further description here.

ihrem Anson HARDY. 

